Researchers have spotted notable code overlap between Sunburst backdoor and a known Turla weapon. Before installing any Kaspersky product, uninstall all previous anti-virus programs including previous Kaspersy installations. Kasperski’s site is an excellent source of suggestions and detailed information. It is well worth the time. Hope the information helps you avoid the consequences this use experienced. Good luck, you’ve already been warned of the consequences of this use. You ned to include any backups that may contain outdated or unwanted AV providers.
Source: https://threatpost.com/firefox-plugin-shows-malware-infested-sites-041510/73835/